William deisooll



No. 609,930. Patented Aug. 30, I898. W. DRISCDLL.

SASH BALANCE.

(Application filed Dec. 29, 1897.)

(No Model.)

UNITED STATES PATENT OFFICE.

\VILLIAM DRISOOLL, OF BROCKVILLE, CANADA.

SASH-BALANCEL SPECIFICATION forming part of Letters Patent No. 609,930,dated August 30, 1898. Application filed December 29,1897. Serial No.664,242. (lilo model.) Patented in and. November 4,1s95,No.5o,455.

T0 all whom it may concern:

Be it knownthat 1, WILLIAM DRIsooLL, a subject of the Queen of GreatBritain, resid: ing at Brockville,in the county of Leeds, Province ofOntario, and Dominion of Canada, have invented a new and usefulSash-Balance, (patented in Canada, No. 50,455, dated November 4, 1895,)of which the following is a specification.

My invention relates to improvements in sash-balances; and theobjectthat I have in view is to improve the construction of adjusters of thatclass in which the sashes are suspended by the employment of a chainwhich runs over a guide-sheave and has one end fastened to the uppersash audits other end ad: j ustably attached to the lower sash.

The object that I have in view is to provide an improved construction ofthe sash-adj uster in which the chain-holder is constructed ,to receiveand clasp the chain in a manner to prevent it from slipping and also toprovide for a limited adjustment thereof on the lower sash for thepurpose of securing such an application or fitting of the parts as todraw the top rail of the upper sash tightly against the cap or head ofthe window-frame when the chain is engaged with the holder to sustainthe upper sash at its highest point.

With these ends in view the invention consists in the novel constructionand combination of parts, which will be hereinafter fully described andclaimed.

To enable others to understand my invention, Ihave illustrated the samein the accompanying drawings, forming a part of this specification, andin which-- Figure 1 is a' front elevation of a window embodying myinvention and illustrating by dotted lines a modified construction bywhich heavy sashes may be suspended at both sides thereof. Fig. 2 is avertical transverse section on the plane indicated by the dotted line 22 of Fig. 3, showing the upper sash and the screen lowered. Fig. 3 is afront elevation similar to Fig. l, but showing the sashes adjusted tothe position indicated by Fig. 2. Fig. 4 is a detail view illustratingone way of attaching the guide-sheave when positioned at one side of thewindow-frame. Fig. 5 is a perspective view of the chain-holder. Fig.6

spaced at suitable distances apart within the frame to form the verticalchannels or grooves which receive and guide the sashes. In case it isdesired to use my improvement without a window-screen the oasin g may besimilar in all respects to those now in use; but when the screen is tobe used in connection with the upper sash I provide the head or cap 3 ofthe frame or casing with a vertical slot 3, which is formed in said heador cap 3 at a point in line with the grooves or channels for the uppersash. This slot 3 is not equal in width tothe width of the channels forthe upper sash for the purpose which will presently appear.

4 designates an upper sash which is fitted between adjacent pairs ofstop-beads to slide freely therein toward or from the head or cap 3 ofthe frame or casing, and the thickness of this upper sash or its toprail issuch that when the sash is raised to its full limit one edgethereof will abut or bear against the cap or head 3 at one side of theslot 3 therein, thus forming the necessary tight joint or connectionbetween the upper rail of the sash 4 and the head or cap 3,notwithstanding the formation of the slot 3 in said cap or head of thewindow-casing. 5Iis the lower sash, fitted in the other set of channelsor grooves provided, by the stopbeads within the window-frame, and boththe upper and lowersashes are similar in all sub stantial particulars toordinary sashes.

6 designates the screen, which consists of a suitable frame carryingordinary screen fabric; This screen 6 is attached to the top rail of theupper sash 4c, and it is arranged to pass through and play in the slot 3of the window frame or casing. The thickness of the screenframe isslightly less than the width of the slot 3 to enable the same to playfreely in the slot, and said screen-frame is also of less thickness thanthe top rail of the upper sash 4, so that the screen-frame may be seatedon and fastened to the upper sash 4 in a manner to leave a projectinglip or edge on said rail of the upper sash for the latter to have thedesired tight engagement with the head or cap of the window-frame.

7 designates the chain forming the operative connection between theupper and lower sashes 4 5 and adapted to suspend the sashes when theyare opened, thus utilizing the weight of one sash to suspend the othersash, as is common in devices of this class. 7 The chain has one endthereof fastened permanently to the upper sash by means of a screw 8 orother suitable fastening, and the free end of this suspending -chain isprovided with a.pull-ring 9. The pull-ring which I prefer to employ isof that kind known to the trade as split and lapped rings, constructed,preferably, of steel and adapted to be sprung apart for the purpose ofengaging with the free end of the chain after the latter shall have beenpassed around the guide-sheave 10. I prefer to employ the split ringhaving its parts overlapping each other, because I have found bypractical experience that such construction of the ring will stand verygreat strain and rough use. The guide-sheave '10 is loosely journaled ina bracket 11, havinga perforated base, through which screws may bepassed for conveniently and readily fastening said bracket to the underface of the head or cap 3 of the window-frame.

In using myimproved sash-adjuster in connection with light-weight sashesit is sufficient to employ a single chain and guidesheave arrangedcentrally with relation to the window-frame and to the sashes,substantially as shown by the full lines in Figs. 1, 2, and-3; but whenthe sash-adj uster is used in connection with heavy-weight sashes it ispreferable to employ two chains and guide-sheaves arranged within thewindow-frame at the sides thereof and having the chains fastened to theupper rail of the upper sash at or near its opposite sides.

- In connection with the chain or chains I employ aspecially-constructed chain-holder 12, consisting in each instance of acast-metal piece comprising a fiat base 13 and an angular forked arm 14.The flat-base 13 of the chain-holder is provided with a longitudinalslot 15, through which passes a fasteningscrew l6 adapted to take intothe upper rail of the lower sash and securely fasten the holder 12thereto by having the head of the screw bind against the slotted base ofthe holder. The width of the slot or fork in the arm 14 of the holder issuch as to admit the narrow end of either link of the suspendingchain,but such slot prevents the passage therethrough of the wide end of thelinks of thereto.

-The chain which I employ is composed of sheet-metal links, each havinga wide looped end and a flat narrow end, substantially as shown by thedrawings, and in fitting the holder and chain to the sashes it mayhappen that the wide end of one of the links will engage with the forkedarm of the holder in such a way that the upper sash will not fit tightlyagainst the head or cap of the window-rail when the chain is drawn tautto elevate the upper sash and then engage with the forked arm of theholder.

My construction of. the chain-holder with the slotted base enables theholder to be adjusted a limited distance on the upper rail of the lowersash, so that the link of the chain may have its wide end engage withthe forked arm of the holder when the sash 4 is drawn to its full limitand its upper rail bears snugly and firmly against the head or cap 3 ofthe window-frame, and the described construction of the chain-holderthus provides means for the proper fitting and application of thesash-adjuster to the window, so as to secure the necessary tight jointbetween the sashes and the frame. I attach especial importance to thedescribed construction of the chainholder for the reasons stated, and inaddition to enabling a tight joint to be secured between the upper sashand the window-frame this chain-holder is very simple and durable inconstruction and efficient in operation.

If desired, the lower sash maybe equipped with a suitable catch,(indicated at 18,) but the detailed construction of the, catch is notmaterial.

My improved sash-adjuster is efticient and reliable in operation in thatprovision is made for the ready lowering of the upper sash to bring thescreen 6 into service for the purpose of ventilating a room or apartmentwithout permitting the ingress of flies and insects The upper sash maybe lowered more or less, as desired, and it is held securely in place byengaging the linked chain with the holder 12. By releasing the chainfrom the holder, lowering the upper sash, and raising the lower sash thechain may then be engaged with the holder in a manner to suspend the twosashes from a single chain.

When the adjuster is used in duplicate at opposite sides of the window,the brackets of the guide-sheaves are fastened to the windowframe,substantially as shown by Fig. 4 of the drawings. Each bracket has oneend set in a recess in one side of the window-frame, and the other endof the bracket is fastened in place by a single screw.

It is evident that slight changes in the form and proportion of partsand in the details of construction may be made without departing fromthe spirit or sacrificing the advantages of the invention.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination with a frame or casing, the

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in 10 the presence of two witnesses.

WILLIAM DRISOOLL.

Witnesses:

J OHN WILLIAMS, H. E..MOEWAN.

